Ox-acetylene cutting and welding torch.



LA. ERRETT.

OX-ACETYLENE CUTTING AND WELDING TORCH.

APPLICATION FlLED 8.14. 1917- Patented Oct. 23, 1917.

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mow A. ERRETT, OF PORTLAND,'0REGON, ASSIGNOB b ONE-T111111) T0 '1. HANNING AND ONE-THIRD TO FRED RQBBLNS, BOTH 0F PORTLAND, OREGON.

OX-ACE'IYLENE CUTTING AND WELDING TORCH.

Specification of Letters Patent.

Patented Oct. 23, 1917.

Application filed February 14, 1917. Serial No. 148.615.

panying drawings, llllll to. l-lu' letters and.

figures of refercnce n:n'ked thereon, which form a part/of l'his specification. 7

This inreninon relates to new and useful improvements in (ix-acetylene or ox hyclrogen cutting and welding torches in which oxygen or acetylene gas or ofiygen imd hyilmgen gases ore intimately mixed to form n circular prohoalingz flame with a high puissnro oxygen jvl' Ilanm inthe neuter.

whcrchy the prchmifingllnnm will nlu'irvsrhc in ailvnnceofthe culling ul. regardless of I I r the posit-Ion or morvnn-nl. ol; the torch.

Another i i-allure "I'- .the invention resides.

mm itsol'l. resulting in economy in the use of gas. I The invention C(lflSlStS further in the provision in connection with tho hu'rmng torch of fire screens 'p mitiono'rl ill the dangerous acetylene linonml Provirlml for the purpose of preventing. flnmjbncks nml explosions while using low. pressure gas.

Another and cnmntinlfc:itnre of the in vention consists in the provision of a torch so constructed lllHI-hthc' tips will. be prc vented .fiom/ovorheating by 'the provision of means for causing cold. oxygen gas to hlow upon the top and of the center tip, kocping the IZOJIITK'JHtIIIP, below the Ignition point. nml in the provision ofmeains for causing the o'x noetylenegas to puss from.

the mixing clininhcr through very sinnll [hues or passages" which in turn are broken into short lengths hy concentric recesses -anil \rlu-rchy, in the event of flare hacks, minute oxplosionx irill occur at'the first intersec- 'tion of flutes and recesses, causing a local high pressure which will extinguish the Home.

My inrcution is illustrated in the accompunlving (ll'iUYlXijIS. in \\'1iich:--

Figure 1 is a centrallongitudinal view lhrough a torch made in accordance with my invention.

Fig. 2 is a side elevation.

Fig.3 is a sectional View on line 33 of Fig. 1.

lfig. -l is a sect ion on line 4 4 of Fig.1. Fig.5 IS a section on line 5'5 of Fig.1

Reference now being hacl to the details i mounted in a l'nissagzcu'nyl'. 2 is n fire norm-n poeitionacl in the passageway in the head 3' which forms a suitable haft andwith which l'mssngcwny a pipe 3 comi'nunicalms lhrough which acetylene or hydro en gas pass into an annular space-'1 formedietween the top of (he outer tip 16 and the torch ln'nil casting 5. Minute holes (5 form pasnngun'a s for the a -ot. \"lono. or hydrogen gas in the chamber -i into the minhin'ing chnn'zhm' T nml which f rms The first. fire screen to prevent hack firing, Oxygen is supplied to the ox-acetylene flanie-from the cross cn bpassage B to the vulva 9 and the oxygeirpipe 1f) 'jivhich leads to the chamber 11. owned between. the top or the inner.

oxygen cutting lip 1'3 and thetorch heard 5, as shown in Fig. 1 of the drawings.

colhn: l'iis formed upon the cutting tip 12 and is adapted to seat against; a shoulder and fits into :rs'coket. 20 formed in the head 5. the ,oxygcn chamber 11 being formed by the collar 17 and cone-shaped top' 19 of the tip 12 inclosed int-he head, 5. A plurality of fine slitsror cuts 17' are formed in ,the collar 17 and afford passages for the oxygen gas into the mixing chamber Tend also form the fire seremrto thecxygen gas and from which chamber the, two gases' (.ncetylone or hydrogen ancloxygenfenter the flutes 21fformerl in-lhe outside walls of the 'oxygen tip; 12, the letter being closedby' 18 formed in the heiid 5. The top 19 of the oxygen t p 12 is cone-shaped, as shown,

VII

the casing 16 and forms the outer or exacctylene preheating tip.

and 22 designate a plurality of annular recesses in the wall of the tip-12 and form interconnecting passageways between the flutes 21, the purpose of which will be presently described. 23 designates a high pressure oxygen intake passage from which oxygen is cross cut to the valve 9 of the low pressure oxygen line 10 and also sup lies oxygen to the lever control valve 24 o the high pressure oxygen line 25. The passageway 26 extends through the center of the tip 12, forming the oxygen tip. A valve 24 in the casting 27 is adapted to be pressed from its seat by a lever '28 the valve 2% being normally held closed by spring 2-9.

It will be understood that in all cases acetylene or hydrogen gas may be used in combination with oxygen to form aorcheating or wielding flame.

In operation, hydrogen gas is admitted to the torch by the actuation of the valve 1, opening the passageway 1 through the fire screen 2, to the hydrogen line :1, thence to the chamber 4-, through the screen 6 to the mixing chamber 7 thence through the flutes 21 to the orifice 30' where it is lighted. After the hydrogen llame is established, oxygen is turned on at the valve 9 thm'pgh the I oxygen line 10 to the chamber 11,through the oxygen fire sc're'eu 17 to the mixing chamber 7 where it joins the hydrogen gas in its passage through the flutes 21. It has been found in practice that. the two gases do not mix readily but produce an irregular and ineilicient flame but, by the provision of a burner made in accordance with my invention, this objection is overcome by the introduction of the annular recesses 22, which cut across the flutes 21 at right angles and the rapidly flowin gases as they strike againstthe cdrners o y the mixers,- formed by the cuts 21 and 22, set up whorls and cross currents which produce a perfectly mixed gas of the highest efficiency. By means of the valve 9, the amount of oxygen may be accurately gaged to produce the required jet of flame.-

In cutting, when the work has been-sulficiently preheated by the ox-hydrogen gas jet, the high pressure oxygen is admitted through the actuation of the valve 24.- into the line 25 through the passage. 26 to the orifice 30 where it sets up an oxidizing flame of great heat and power and, by means .of the lever controlled valve 24, the regulation is, at all times, under perfect control of the operator.

What I claim to be new is A cutting and welding torch comprising a torch head with ducts therein, valve-regulated pipes communicating with said ducts and having connection with a handle, said head having chambered portion with a shoulder in its wall, an oxygen cutting tip fitted in said chambered portion and provided with a central duct communicating with one of the ducts in the head and through which oxygen is admitted, said tip haringa collar engaging said shoulder and provided with slits in the marginal edge thereof, a space above the shoulder forming an oxygen chamberand with which a supply dilcl'. in the head communicates, the space about the collar below said shoulder forming a mixing chamber which communicates through said slots in the oxygen chamber, said tip having a series of annular recesses communicating with fluted channels, an outer preheating tip fitted over said oxygen tip and fitted within said head and having threaded connection therewith, a slight space intervening between the inner end of said outer preheating tip and said collar, forming cmilll'llllllciltll'lg passageways between the mixing chamber and said annular recesses.

In testimony whereof I hereunto allix my 

